Kazuki Yamamoto / USBFileSystem

[ FORK ] USBFileSytem; fork from sissors/USBFileSystem

Dependents:   USBMSD_CDC_11U35test

Fork of USBFileSystem by Erik -

FATFileSystem/FATFileSystem.cpp@7:da1f3328a496, 2015-01-18 (annotated)

Committer:
Sissors
Date:
Sun Jan 18 21:31:55 2015 +0000
Revision:
7:da1f3328a496
Updated USBDevice and added count argument

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Sissors 7:da1f3328a496 1 /* mbed Microcontroller Library
Sissors 7:da1f3328a496 2 * Copyright (c) 2006-2012 ARM Limited
Sissors 7:da1f3328a496 3 *
Sissors 7:da1f3328a496 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
Sissors 7:da1f3328a496 5 * of this software and associated documentation files (the "Software"), to deal
Sissors 7:da1f3328a496 6 * in the Software without restriction, including without limitation the rights
Sissors 7:da1f3328a496 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
Sissors 7:da1f3328a496 8 * copies of the Software, and to permit persons to whom the Software is
Sissors 7:da1f3328a496 9 * furnished to do so, subject to the following conditions:
Sissors 7:da1f3328a496 10 *
Sissors 7:da1f3328a496 11 * The above copyright notice and this permission notice shall be included in
Sissors 7:da1f3328a496 12 * all copies or substantial portions of the Software.
Sissors 7:da1f3328a496 13 *
Sissors 7:da1f3328a496 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
Sissors 7:da1f3328a496 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
Sissors 7:da1f3328a496 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
Sissors 7:da1f3328a496 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
Sissors 7:da1f3328a496 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
Sissors 7:da1f3328a496 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
Sissors 7:da1f3328a496 20 * SOFTWARE.
Sissors 7:da1f3328a496 21 */
Sissors 7:da1f3328a496 22 #include "mbed.h"
Sissors 7:da1f3328a496 23
Sissors 7:da1f3328a496 24 #include "ffconf.h"
Sissors 7:da1f3328a496 25 #include "mbed_debug.h"
Sissors 7:da1f3328a496 26
Sissors 7:da1f3328a496 27 #include "FATFileSystem.h"
Sissors 7:da1f3328a496 28 #include "FATFileHandle.h"
Sissors 7:da1f3328a496 29 #include "FATDirHandle.h"
Sissors 7:da1f3328a496 30
Sissors 7:da1f3328a496 31 DWORD get_fattime(void) {
Sissors 7:da1f3328a496 32 time_t rawtime;
Sissors 7:da1f3328a496 33 time(&rawtime);
Sissors 7:da1f3328a496 34 struct tm *ptm = localtime(&rawtime);
Sissors 7:da1f3328a496 35 return (DWORD)(ptm->tm_year - 80) << 25
Sissors 7:da1f3328a496 36 | (DWORD)(ptm->tm_mon + 1 ) << 21
Sissors 7:da1f3328a496 37 | (DWORD)(ptm->tm_mday ) << 16
Sissors 7:da1f3328a496 38 | (DWORD)(ptm->tm_hour ) << 11
Sissors 7:da1f3328a496 39 | (DWORD)(ptm->tm_min ) << 5
Sissors 7:da1f3328a496 40 | (DWORD)(ptm->tm_sec/2 );
Sissors 7:da1f3328a496 41 }
Sissors 7:da1f3328a496 42
Sissors 7:da1f3328a496 43 FATFileSystem *FATFileSystem::_ffs[_VOLUMES] = {0};
Sissors 7:da1f3328a496 44
Sissors 7:da1f3328a496 45 FATFileSystem::FATFileSystem(const char* n) : FileSystemLike(n) {
Sissors 7:da1f3328a496 46 debug_if(FFS_DBG, "FATFileSystem(%s)\n", n);
Sissors 7:da1f3328a496 47 for(int i=0; i<_VOLUMES; i++) {
Sissors 7:da1f3328a496 48 if(_ffs[i] == 0) {
Sissors 7:da1f3328a496 49 _ffs[i] = this;
Sissors 7:da1f3328a496 50 _fsid = i;
Sissors 7:da1f3328a496 51 debug_if(FFS_DBG, "Mounting [%s] on ffs drive [%d]\n", _name, _fsid);
Sissors 7:da1f3328a496 52 f_mount(i, &_fs);
Sissors 7:da1f3328a496 53 return;
Sissors 7:da1f3328a496 54 }
Sissors 7:da1f3328a496 55 }
Sissors 7:da1f3328a496 56 error("Couldn't create %s in FATFileSystem::FATFileSystem\n", n);
Sissors 7:da1f3328a496 57 }
Sissors 7:da1f3328a496 58
Sissors 7:da1f3328a496 59 FATFileSystem::~FATFileSystem() {
Sissors 7:da1f3328a496 60 for (int i=0; i<_VOLUMES; i++) {
Sissors 7:da1f3328a496 61 if (_ffs[i] == this) {
Sissors 7:da1f3328a496 62 _ffs[i] = 0;
Sissors 7:da1f3328a496 63 f_mount(i, NULL);
Sissors 7:da1f3328a496 64 }
Sissors 7:da1f3328a496 65 }
Sissors 7:da1f3328a496 66 }
Sissors 7:da1f3328a496 67
Sissors 7:da1f3328a496 68 FileHandle *FATFileSystem::open(const char* name, int flags) {
Sissors 7:da1f3328a496 69 debug_if(FFS_DBG, "open(%s) on filesystem [%s], drv [%d]\n", name, _name, _fsid);
Sissors 7:da1f3328a496 70 char n[64];
Sissors 7:da1f3328a496 71 sprintf(n, "%d:/%s", _fsid, name);
Sissors 7:da1f3328a496 72
Sissors 7:da1f3328a496 73 /* POSIX flags -> FatFS open mode */
Sissors 7:da1f3328a496 74 BYTE openmode;
Sissors 7:da1f3328a496 75 if (flags & O_RDWR) {
Sissors 7:da1f3328a496 76 openmode = FA_READ|FA_WRITE;
Sissors 7:da1f3328a496 77 } else if(flags & O_WRONLY) {
Sissors 7:da1f3328a496 78 openmode = FA_WRITE;
Sissors 7:da1f3328a496 79 } else {
Sissors 7:da1f3328a496 80 openmode = FA_READ;
Sissors 7:da1f3328a496 81 }
Sissors 7:da1f3328a496 82 if(flags & O_CREAT) {
Sissors 7:da1f3328a496 83 if(flags & O_TRUNC) {
Sissors 7:da1f3328a496 84 openmode |= FA_CREATE_ALWAYS;
Sissors 7:da1f3328a496 85 } else {
Sissors 7:da1f3328a496 86 openmode |= FA_OPEN_ALWAYS;
Sissors 7:da1f3328a496 87 }
Sissors 7:da1f3328a496 88 }
Sissors 7:da1f3328a496 89
Sissors 7:da1f3328a496 90 FIL fh;
Sissors 7:da1f3328a496 91 FRESULT res = f_open(&fh, n, openmode);
Sissors 7:da1f3328a496 92 if (res) {
Sissors 7:da1f3328a496 93 debug_if(FFS_DBG, "f_open('w') failed: %d\n", res);
Sissors 7:da1f3328a496 94 return NULL;
Sissors 7:da1f3328a496 95 }
Sissors 7:da1f3328a496 96 if (flags & O_APPEND) {
Sissors 7:da1f3328a496 97 f_lseek(&fh, fh.fsize);
Sissors 7:da1f3328a496 98 }
Sissors 7:da1f3328a496 99 return new FATFileHandle(fh);
Sissors 7:da1f3328a496 100 }
Sissors 7:da1f3328a496 101
Sissors 7:da1f3328a496 102 int FATFileSystem::remove(const char *filename) {
Sissors 7:da1f3328a496 103 FRESULT res = f_unlink(filename);
Sissors 7:da1f3328a496 104 if (res) {
Sissors 7:da1f3328a496 105 debug_if(FFS_DBG, "f_unlink() failed: %d\n", res);
Sissors 7:da1f3328a496 106 return -1;
Sissors 7:da1f3328a496 107 }
Sissors 7:da1f3328a496 108 return 0;
Sissors 7:da1f3328a496 109 }
Sissors 7:da1f3328a496 110
Sissors 7:da1f3328a496 111 int FATFileSystem::rename(const char *oldname, const char *newname) {
Sissors 7:da1f3328a496 112 FRESULT res = f_rename(oldname, newname);
Sissors 7:da1f3328a496 113 if (res) {
Sissors 7:da1f3328a496 114 debug_if(FFS_DBG, "f_rename() failed: %d\n", res);
Sissors 7:da1f3328a496 115 return -1;
Sissors 7:da1f3328a496 116 }
Sissors 7:da1f3328a496 117 return 0;
Sissors 7:da1f3328a496 118 }
Sissors 7:da1f3328a496 119
Sissors 7:da1f3328a496 120 int FATFileSystem::format() {
Sissors 7:da1f3328a496 121 FRESULT res = f_mkfs(_fsid, 0, 512); // Logical drive number, Partitioning rule, Allocation unit size (bytes per cluster)
Sissors 7:da1f3328a496 122 if (res) {
Sissors 7:da1f3328a496 123 debug_if(FFS_DBG, "f_mkfs() failed: %d\n", res);
Sissors 7:da1f3328a496 124 return -1;
Sissors 7:da1f3328a496 125 }
Sissors 7:da1f3328a496 126 return 0;
Sissors 7:da1f3328a496 127 }
Sissors 7:da1f3328a496 128
Sissors 7:da1f3328a496 129 DirHandle *FATFileSystem::opendir(const char *name) {
Sissors 7:da1f3328a496 130 FATFS_DIR dir;
Sissors 7:da1f3328a496 131 FRESULT res = f_opendir(&dir, name);
Sissors 7:da1f3328a496 132 if (res != 0) {
Sissors 7:da1f3328a496 133 return NULL;
Sissors 7:da1f3328a496 134 }
Sissors 7:da1f3328a496 135 return new FATDirHandle(dir);
Sissors 7:da1f3328a496 136 }
Sissors 7:da1f3328a496 137
Sissors 7:da1f3328a496 138 int FATFileSystem::mkdir(const char *name, mode_t mode) {
Sissors 7:da1f3328a496 139 FRESULT res = f_mkdir(name);
Sissors 7:da1f3328a496 140 return res == 0 ? 0 : -1;
Sissors 7:da1f3328a496 141 }
Sissors 7:da1f3328a496 142
Sissors 7:da1f3328a496 143 int FATFileSystem::mount() {
Sissors 7:da1f3328a496 144 FRESULT res = f_mount(_fsid, &_fs);
Sissors 7:da1f3328a496 145 return res == 0 ? 0 : -1;
Sissors 7:da1f3328a496 146 }
Sissors 7:da1f3328a496 147
Sissors 7:da1f3328a496 148 int FATFileSystem::unmount() {
Sissors 7:da1f3328a496 149 if (disk_sync())
Sissors 7:da1f3328a496 150 return -1;
Sissors 7:da1f3328a496 151 FRESULT res = f_mount(_fsid, NULL);
Sissors 7:da1f3328a496 152 return res == 0 ? 0 : -1;
Sissors 7:da1f3328a496 153 }